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公开(公告)号:US3969158A
公开(公告)日:1976-07-13
申请号:US279521
申请日:1972-08-10
申请人: Albert S. Holbert
发明人: Albert S. Holbert
CPC分类号: C21D6/001
摘要: A heat treatment of nine percent nickel steel including carburizing, double normalizing, tempering, subcooling and then tempering to provide a steel having useful mechanical properties at extremely low temperatures.
摘要翻译: 包括渗碳,双重归一化,回火,过冷却然后回火的9%镍钢的热处理,以提供在极低温度下具有有用的机械性能的钢。